Chain saw



FIG. 1 is a frontal perspective view showing our novel configuration for a chain saw design;

FIG. 2 is a rear view thereof;

FIG. 3 is a side view thereof from the left side;

FIG. 4 is a side view thereof from the right side;

FIG. 5 is a front view thereof;

FIG. 6 is a top view thereof; and,

FIG. 7 is a bottom view thereof. 

The ornamental design for a chain saw, as shown and described. 